Analysis of clinical characteristics of lung adenocarcinoma patients with exon 21 L858R deletion mutation / 肿瘤研究与临床

ABSTRACT

Objective:To explore the clinical characteristics of lung adenocarcinoma patients with exon 21 L858R deletion mutation.Methods:The data of 112 patients who were diagnosed with lung adenocarcinoma and positive genetic mutations in the People's Hospital of Xinjiang Uygur Autonomous Region from January 2015 to December 2018 was retrospectively analyzed, and the patients were divided into the exon 21 L858R deletion mutation group (52 cases) and the non-exon 21 L858R deletion mutation group (60 cases). The clinical characteristics, imaging characteristics, expressions of tumor markers and smoking history of patients were compared between the two groups.Results:There was no statistical difference in the gender, age and ethnicity between the exon 21 L858R deletion mutation group and the non-exon 21 L858R deletion mutation group (P values were 0.488, 0.238 and 0.191). There was no statistical difference in the imaging features (including primary tumor site, lobulation, burr, pleural depression and small vacuoles) between the two groups (all P > 0.05). There was no statistical difference in the expressions of tumor markers (including carcinoembryonic antigen, squamous cell carcinoma antigen, neuron-specific enolase, cytokeratin 19 fragment, and gastrin-releasing peptide precursor) between the two groups (all P > 0.05). There were 20 patients (38.5%, 20/52) with smoking history in the exon 21 L858R deletion mutation group, and 4 patients (6.7%, 4/60) with smoking history in the non-exon 21 L858R deletion mutation group, the difference between the two groups was statistically significant (χ 2 = 4.182, P = 0.041). Conclusions:There is no significant difference in clinical characteristics, imaging features and expressions of tumor markers between the patients with exon 21 L858R deletion mutation and the patients without exon 21 L858R deletion mutation. Smoking may be the influencing factor of exon 21 L858R deletion mutation.